A Method for Quickly Determining the Level of Third-Order Passive Intermodulation Products in Rectangular Waveguide Flanges

A technology of rectangular waveguide and passive intermodulation, which is applied in the field of quickly determining the level of third-order passive intermodulation products of rectangular waveguide flanges, and can solve the problems of complex calculation process and many parameters introduced

Inactive Publication Date: 2020-10-23
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can predict the level of passive intermodulation products, but the disadvantage is that it also needs to obtain the surface topography parameters of the product flange in advance, and the introduction of many parameters makes the calculation process complicated

Method used

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  • A Method for Quickly Determining the Level of Third-Order Passive Intermodulation Products in Rectangular Waveguide Flanges
  • A Method for Quickly Determining the Level of Third-Order Passive Intermodulation Products in Rectangular Waveguide Flanges
  • A Method for Quickly Determining the Level of Third-Order Passive Intermodulation Products in Rectangular Waveguide Flanges

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Embodiment

[0025] Embodiment: Four waveguide flanges of FDM22, FDM40, FDM84 and FDM180.

[0026] This embodiment discloses a method for quickly determining the level of third-order passive intermodulation products of a rectangular waveguide flange, including the following steps:

[0027] Step 1: The contact surface of the rectangular waveguide flange is equivalent to a metal-insulation layer-metal structure, and the potential difference on both sides of the contact surface of the rectangular waveguide flange is determined;

[0028] The contact surface of the rectangular waveguide flange is equivalent to a metal-insulation layer-metal structure, and the potential difference V on both sides of the rectangular waveguide flange contact surface is obtained according to the current continuity equation;

[0029]

[0030] in, H=1×10-9m, μ=1.256637×10-6H / m, ε=8.854188×10-12F / m, rectangular waveguide wide side a and narrow side b, carrier power P, carrier frequency ω and flange contact surfac...

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Abstract

The invention discloses a method for quickly determining a third-order passive intermodulation product level of a rectangular waveguide flange, and belongs to the passive intermodulation field of microwave components. The method includes: Step 1: the rectangular waveguide flange contact surface is equivalent to a metal-insulation layer-metal structure, and the potential difference between the twosides of the rectangular waveguide flange contact surface is determined; Step 2: The third-order nonlinear current generated by the rectangular waveguide flange contact surface is determined by the rectangular waveguide size, the flange contact area, and the potential difference between the two sides of the contact surface; Step 3: the level of the third-order passive intermodulation products of the rectangular waveguide flange is determined by using the carrier frequency, the rectangular waveguide size, and the third-order nonlinear current.. The invention can obtain the third-order passive intermodulation product level of the rectangular waveguide flange by simple calculation without obtaining the passive intermodulation low-order product and the surface topography parameter measurementin advance, thereby greatly improving the rectangular waveguide method. The efficiency of the passive passive intermodulation problem is reduced and the cost is reduced.

Description

technical field [0001] The invention relates to a method for quickly determining the level of the third-order passive intermodulation product of a rectangular waveguide flange, which can quickly analyze the influence of waveguide size, contact area and carrier frequency on the level of the third-order passive intermodulation product, mainly for microwave The design and manufacture of high-power waveguide flanges in communication systems belongs to the field of passive intermodulation of microwave components. Background technique [0002] At present, with the continuous increase of transmitting power and continuous improvement of receiving sensitivity, space satellite communication systems and ground mobile communication systems have higher and higher requirements for passive intermodulation indicators of microwave components. The waveguide flange is a channel for high-power signals, and also contains metal-metal contact, a structure that is prone to passive intermodulation, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
CPCG06F30/367
Inventor 李东何鋆王琪封国宝胡天存
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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